【单选题】Mary’s score on the test is the highest in her class; she ____ have studied very hard
【单选题】Mary’s score on the test is the highest in her class; she ______ have studied very hard.
【判断题】移动商务的价值链增值能力高于电子商务价值链。
【判断题】移动商务的价值链增值能力高于电子商务价值链。( )
【单选题】Mary’s score on the test is the highest in her class; She____have studied very hard.
【单选题】Mary’s score on the test is the highest in her class, and she ____ have studied very hard.